Permanent mold for making castings



Sept. l, 1925. 1,552,247

J. s. THoMPsoN l PERMANENT MOLD FOR MAKING CASTINGS Filed Aug. 11, 1924 zsneets-sheez 1 Sept. l, 1925.

1,552,247 J. S. THOMPSON PERMANENT MOLD FOR MAKING CASTINGS Filed Aug. 11, 1924 2 Sheets-Shoot 2 fig, i

Patented Sept. 1, 1925.

UNITED STATES JAMES S. THOMPSON, OF PELHAM, NEW YORK.

PERMANENT MO'LD FOR MAKING CASTINGS.

Application filed August 11, 1924. Serial No. 731,242.

To @ZZ whom t may concern.'

Be 1t known that I, JAMES S. THOMPSON,

a citizen of the United States, residing ati Pelham, in the county of Westchester 'and State of New York, have inventedcertain new and useful Improvements in Permanent Molds for Making Castings, of which the following is a specification. v

This invention relates to permanent molds for makingcastings and its object is to fa-v cilitate opening and closing the mold and to.

enable this Operation to be quickly and easily accomplished without injury to the casting or to the mold and with the exercise of a minimum amount of labor.

A further and important object of the invention is to provide means whereby one member of a permanent mold may be moved bodily and uniformlyv away from the other member or members of the mold to' clear any projections of the casting inthe movable memberof the mold vso that this movable member can be swung to open position without engaging any part of thesc'asting and without damaging thecasting .or the mold in any way. y

The invention also has for its object to provide means for connecting the members of a permanent mold ls'o that one member can be swung relative to the other member to open positionl to permity access to thev mold cavity or to permit removal of the casting, these means being constructed and Y arranged to be easily operated 1n a manner P which will enable the movable Ymember of the mold to clear projections on thelcasting before the swinging movement commences, whereby the movable member can be swung to Open position without damaging the casta j to the opening operation. The present 1ning or the mold.

In the accompanying drawings I `have illustrated a selected embodiment of vthe invention, whereinr F ig. 1 is a side elevation of 'a permanent mold embodying theinvention.

'Fig 2 is a top plan view. j

Fig. 3 is a rear end elevation. y

Fig. 4 shows the cope thrown tO open position relative to a portion of the` drag.

In that embodiment of the invention se lected for illustration in the drawings, the" permanent mold comprises a drag 5 and 'a cope 6 having a mOld cavity 7 therein adapty ed for casting a brake shoe. The walls of the mold cavity may consist in whole or in part of ythe metal of the drag and. the cope, or all or parts of the cavity walls may consist of refractory material set in the drag and cope, or the walls lmay be provided with a refractory `or other Ycoating inl whole or in part, as may-bedesired to produce la plain cast iron casting or a chilled cast iron casting or a cast iron casting part Yplain and part chilled. In a series of Patents, N o. 1,484,421 to 1,484,438 inclusive, granted to me February 19, 1924, vI have disclosedl certain improvements in and relating to permanent molds which are adapted for making brake shoes and other plain or .partly chilled cast iron castings, and while this invention is especially. desirable in those molds whichv have mold cavityv walls all or partly refractory, because of the relatively fragile characterV of the refractory, `it is not the less im-y portant in molds having cavity walls made entirely of metal because Vof the greatfacility affordedfby the invention for opening and closingthe mold without damage tothe casting o-r to any part of the mold. .Therefore, I would haveit understood that the present operating mechanism is adaptable for use in any type of permanent mold, so far as'I am aware,in which one lmember must be swung away from the other member or members to permitaccess to the mold cavity or to the casting.

In my Patents No. 1,484,439 and 1,484,440 granted to me February 19, 1924, I have shown means which have proven to be useful and satisfactory for the purpose of imparting a kick or jar to the cope of a permanent mold to release it from possible vsticking, contact with the drag and the casting preliminary lminary; to the'opening Operation, and to enable the moldto be opened in one continuous operation, wherein the'movable member,

' whether it rbe the cope or some other part,

is given a movement relative vto the stationary member or members which will enable the movable member to clear any parts ofV or projections on the casting before the 1 swinging` movement of the opening operation commences. In other words, it is an important object of the invention to im# part to the cope a rectilinear movement, that The arms 11g are! provided with slots 12y to.

receive the Vpins l'which are secured inthe rear en -di4 14. of? theco-pe, the `slots being Aprovidedto permit a movement o'fit'he cope 1n a` right line awayA'fi-om the drag fora limited distance, while the; bell: cranlrlevers are swingingin an arco-n their :pivots 9.- The arms l@ areconnected'by across-barde and.

provided withv ashort stud-.16, toreceive a4 removable handle barrl which may/be a. section .ofi pipe. Parallel! links 18 projectforwa-rd fromthge bell fcranklevers to aposil tion adjacenttheforward' end: of the cope,

where they -arepivotally connected at 19Jto the upright arm's 20..of bell crank levers,

whichA are pivotedi at 2l to thecope. Arms 22 of: these bell'- cranlrlevers project rear.-

wardly alongsi die. thecoipe "have rounded: bearing .surfaces 28 .arrangedlto .engage comeV Y plementany. bearings,- Qa. on. the plates. 25j Pins.` 26;: are'fixed in. theQcopeabove thezf'shor-t: arms.- 22l and theses. pins, p'rloj ect= .only a ,p short` dise.

which are fastenedi to the.drag.

tance from the sid'esiofrthe cope so that` they will beenga-ged by :thev 20 but willben clearediby the links 18;:

The mold, as. shown, issprogvidedwitharemovablev pouring gate .Zien-.df a. gate. core 28, which for-mtheend of thek mol-d cavity,-

as; more particularly set` forth in mycomr., panion application 731,243;filedgconey currently herewith, but the inventionisnot limited to permanent mold of particular. construction, since it will be appanentthat;

it can be applied t0. manyY of the molds Of* my patents aforesaid, aswellfas to the particnlazrY inoldherein shown,Y .and others..

In practice, the hotmetal having been poured? in the. closed mold, force is ,appliedl to the. levers. 16'. to swing the copefrom. closed position, indicated, inifull' lines in. Fig.` 1, -toopen positionlas shown-.fin Fig. 4.

The mold .shown is, made .to produce .a brake.

shoe and the mold'cavityf indicated in:V broken lines sufficientlyV shows tlieishapeof@v the. cavity for .producingf-a car shoe ,having anattaching lug29 and end lugs It willi Y read-,ily beseen thatsthe cope mnstbe lifted-Vv ormoved rectilinearly., relative to .the drag beforeit irs-swung bodilyv endvi'ise,in,order that, the cope may clear` theattaohing lug and the end llugs and otherwise release ,itself from the drag/andthe casting. This brakeA Shoe casting illustrates very clearly the importance, as well as the operation, of the invention, butyl do not. limit the invention to the` manufacture of brake shoes, since it c-anbe employed with satisfactory results in makinqother castings.

Therefore, in order to move the cope 'bodilyfaway fromthe `dragin a right line to clear the drag and the casting, the slots l2 provide for the. necessary lost motion be.-

tween the rear bell cranks pivoted at 9 andY the cope, andthe forward bell cranks pivoted atl 21 constitute guides whereby when the lever-17' is pulled rearward, to lthe right in Figs.. l-,QlandV l., vthe-cope moves upward for. a distance sufficient to. clear. the projections on the casting, as indicated in broken lines in Fig. l, andfthenbegins'its swinging. movement fromthis broken lineposition in Fig. l'. to the position. indicated.' in Fig. 4. This ini-tial: rectilinear movement .ofy the. cope is induced' bytheleven lthnough the belli cranks. pivoted at 9, andfthe slots 1Q- provide that` amountl .of lost motion necesa. sary tooenable. the bell cranks, to swing -in an arc on their pivots, while at the same. time. they fare. lifting. `the .cope vfrom the drag; andthe forward bell cranks. pivoted atl 2l having. a.be.aring in the,Y seatsonA .thel dragV yoperate as guides to. compel i the cope to move onlyyin a right line fora limited*` distancesuflicient for thecope to clear thev projections on. the casting. before the cope. beg'insits swinging. lmovemeiit. to full open position. The initial right linel movementand the swinging movement yin. an* arc on. the center 9 are successive,ybut constitutea. continuousopening operation.

When the .Cope has proceeded in tsright line.- Inovenient; a suiicent .and predetermined`v distance, the arms 2.0 ofthe guidev bellk crank leverswillY engage the pins-26.,` and thereafterthe cope is caused toswing in .anarcon the center 9. l/Vhen'the cope. iS.` fully Opened, iti mayconveniently rest upon theY floor. 31. and; in the construction illustrated fthe ,cross-.bar 15V engages. the floor. rllheweight of the cope causes. it to swing downward .on the center i3; and engagementl ofithe pins 26 withtlle arms 22 of the guide bell crank levers limits this move-l Inentiof' thecope, so that. it is maintained in a convenient position, when, opened, forV the insertion of a reinforcingback andrlug, orion any other purpose. To close 'the mold, the lever is swungforward andthe cope is; returned to engagement with the drag, as shown in Fig. l; Y l

The invention. comprises a simple and easilymanipulated Voperai;ing mechanism for openingnpermanent mold with the ,exercise off comparativly little power, and without liabilityof damage-to the mold, or to the? casting, lby imparting tov the movableinem-` ber of the` mold; an initial movementin a. right line relative to the drag, until it clears all projections on the drag and the casting and is free to swing in an arc endwise to open position. This enablesthe mold to be opened very shortly after the metal has been poured, so that the casting may cool more rapidly and be removed to permit the mold to be set for another casting operation. The invention overcomes any tendency of the movable member of the mold sticking and avoids liability of damage to the mold or to the casting by reason of sticking or other difculties which are sometimes experienced in opening permanent molds.

The invention can be applied to molds of different Vconstruction andy for that, and other purposes, various changes in the form, construction and arrangement of parts may be made without departing from the invention or sacricing its advantages, and I consider myself entitled toy make all lsuch changes as fairly fall within the scope of the following claims:

I claim:

1. The combina-tion of a permanent mold comprising a movable member and a relatively fixed member, a lever for operating the movable member, and means for imparting to the movable member an initial rectilinear movement relative to the fixed member followed by a swinging movement to open the mold.

2. The combination of a permanent mold comprising a movable member andv a relatively xed member, a lever pivotally engaged withr the fixed member for swinging the movable member to open position, and means cooperating with said lever for imparting to the movable member an initial rectilinear movement relative to the fixed member before the movable member swings on the pivot of the lever as a center to open the mold.

3. The combination of a permanent mold comprising a movable member and a relatively fixed member, a lever' pivoted to the rear end of the fixed member and engaged with the rear end of the movable member, and means cooperating with the lever for imparting to the movable member an initial rectilinear movement relative to the fixed member before the movable member swings on the pivot of the lever as a center to open the mold.

4l. The combination of a permanent mold comprising a movable member and a relatively fixed member, a lever engaged with one end of the fixed member and with the corresponding end of the movable member for swinging the movable member to open position, and means at the other end of said members to guide the movable member in a rectilinear movement relative to the fixed member before the movable member is swung to open position. l

5. The combination of a permanent mold comprising a movable member and a relatively fixed member, a lever pivoted to the rear end of the fixed member and loosely engagedA with the rear end of the movable member for operating the movable member, and guiding means on said members for imparting tothe movable member an initial rectilinear movement relative to the fixed member before the movable member swings on the pivot of the lever as a center to open the mold. l

6. The combination of a permanent moldk comp-rising a movable member and a relatively fixed member, a lever for operating the movable member andengaged therewith, means for providing lost motion between said lever and said movable member to permitlimited independent movement of member, and guiding means comprising a lever on the movable member having a bearing on the fixed member for compelling an initial rectilinear movement `of the movable member relative to the fixed member before the movable member swings to open posit-ion.

8. The combination of a permanent mold comprising a movable member and a relatively fixed member, a bell crank lever pivoted toone end of the fixed member and having one arm thereof loosely engaged with the corresponding end of the movable member, a bell crank guide on the movable member at its other end, a bearing on the fixed member for one arm of the guide, and links connecting the other arms o-f said lever and guide to compel an initial rectilinear movement of the movable member relative to the fixed member before the movable member swings to open position.

9. The combination of a permanent mold comprising a movable member and a relatively fixed member, a lever for operating the movable member, said lever being pivoted to the fixed member and loosely engaged with the movable member toI permit lost motion between the lever and the movable member, a guide on the movable member having aI bearing on the fixed member, and means for connecting the lever and the guide so that the movable member has an initial rectilinear movement relative to the fixed member before the movable member swings to open position.

lO. The combination of a permanent mold comprising a. movablefmember andi a rela tlvelyxedmember, kak ,bell Crank lever privoteclA to the rea-r.- end of; the.l fixed member and pivotally connected to the rearenfl of the movable member tof provide e lost motion betweenvitself and' the removable memco-nneetingthe leveilmdf the guide, and a Stop on the movable member for limiting the movement of the guide, whereby toimpart to the movable membereii initial rectilinear movement relative to thev fixed meiiibei'@fol/-y low-eel by' swinging movement of the movable member on. the` pivot of the` liever Y 2L center. toopen. tbef mold,

ll. The.eombiiiatiomoi ai. {permanentmold gate and( a. send core therefor arrr-,zmgecltoY form one enel of themolclieevlity, eh lever at. the opposite enel o tlie mold' for operating: the movable member, andlmeaiiswfor imparting tov the movable member initial reatiT linear movement reletiveto the iXeClimem ber followed by swinging; movement: bezopeny the mold. Y

Mmes.: e. THoMPeoN 

